berger



J. BERGER, JR.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JULY 20.1915.

1,312,823. Pareuwdmlg. 12,1919;

s SHEETS-SHEEF 1.

31mm ntoz' anemia 33 J. BERGER, JR.

FEEDSNG MECHANISM FOR SEWING MACHiNES.

APPLICATION FILED JULY 20,1915- Putented Aug. 12, 1919,

3 SHEETS-SHEET 2.

b Q01. 7 mm J. BERGER, JR. FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JULY 20,1915.

Patented Aug". 12, 1919.

Whkwwooao improvements in JOSEPH BERGER, 3B,, OF U'IICA, NEW YORK, COMPANY, OF CHICAGO, ILLINOIS,

FEEDING MECHANISM ron SEWING-MACHINES.

ASSIGNOR TO UNION SPECIAL MACHINE A CORPORATION OF ILLINOIS.

Application filed July 20, 1915.

To all whom it may concern:

Be it known that I, Josnrn BERGER, J12, a citizen of the United States, residing at Utica, in the county of Oneida, State of New York, have invented certain new and useful Improvements in Feeding Mechanism for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference markedthereon.

The invention relates to new and useful feeding mechanisms for sewing machines, and more particularly to a differential feeding mechanism.

An object of the invention is to provide a work support in the form of a cylindrical arm with a differential feeding mechanism' consisting of a main feed bar having a main feed dog and an auxiliary feed bar having an auxiliary feed dog, wherein the auxiliary feed bar is operated from the main feed bar.

A further object of the invention is to provide a feeding mechanism tending outwardly from said work-supporting arm for adjusting the throw of the auxiliary feed dog.

A still further object of the invention is to provide a cylindrical work-supporting arm which is suspended, with a differential feeding mechanism consisting of a main feed bar having a main feed dog, and an auxiliary feed bar having an auxiliary feed dog, wherein the main feed bar is operated by devices extending through the suspend ing means. and the auxiliary feed bar is operated from a connection tOthG main feed bar in the work-supporting arm.

-hese and other objects will in part be obvious, and willin part be hereinafter more fully described.

In the drawings which show by way of illustration one embodiment of theinveiition.-

Figure 1 is a view partly in end elevation and partly in vertical section, showing a sewing machine embodying my "improvements;

Fig. 2 is a view partly in plan and partly in horizontal section of the work supporting arm and the depending arm which car ries said work supporting arm;

- I Specification of Letters Patent.

' auxiliary of the above character with a hand-controlled lever exfoot 7 is carried by Serial No. 40,892.

Fig. 3 is a transverse sectional view on the line 33 of Fig. 1;

Fig. 4: is a transverse sectional view on the line 4-4: of Fig. 2;

Fig. 5 is a vertic l sectional view through the depending arm and the end of the horizontal arm which carries the same, the section being taken on the line 5 5 of Fig. 1;

Fig. 6 is a sectional view on the line (S -6 of Fig. 5;

Fig. 7 is a detail perspective view of the a feed dog and the feed bar for supporting the same;

Fig. 8 is a detail in perspective of the main feed dog and the feed bar for supporting the same;

Fig. 9 is a detached detailin perspective of the mechanism for operating the auxiliary feed bar and for changing th e throw of the same;

Fig. 10 is a detail showing in side elevation a sectionof the depending arm and the control for varying the throw of the" auxiliary feed dog;

Fig. 11 is a perspective view of the shifting lever for controlling the throw of the auxiliary feed dog;

Fig. 12 is a detail partly in vertical section, showing the means looper.

The invention is particularly adapted to a sewing machine for stitching fabrics resulting in the formation of tubular articles,

Said machine consists of a supporting standard 1, carried by a base 2. Said supporting standardcarries an overhanging arm, at the forward end of which is a supporting head 3. A needle bar 4: reciprocates in said supporting head and is provided with two sets of needles 5' and 6.

a presser bar 8. Mounted on the presser-bar 8 is a yoke 9, which Patented Au 12, 1919. 4

for operating the The presser tell the standard 1 is a hollow arm 11. hollow arm 11 carries a horizontal arm 1:2

outwardly projecting arm l0, through ""n the yoke is oscillated. This yoke can the movable trimming clad-t: of a trimng mechanism operating upon the inaall in advance of the needles.

Projecting outwardly and upwardly from This lilo main shaft mounted in s1 chic besrii in the staiiulai'd l. A. lug shalt outed in the horizo el rotated. by suit -ting Pi eons iron) the main shaft enclin arm 13, as herein shown, :5 separate l'rorn the horizontal arm 12 and is bolted thereto by suitable bolts 1'? and 18.

ifhe arms 1:2 and 13 are orov-idcd with sul a able webs having a hearing bushing 19 for the shaft 16. The 'WOlk supporting arm ll carries a throat plate 20 which is secured. to the work supporting arm by suitable screws :21. feed slots 22 and with needle openings 23 and 24. Projecting through the fced'slots is main feed dog which is mounted on a feed liar so. This main feed car 26 is irovided with a longitudinal recess or groove Also cx'teudiiw through the feed 22 is auxiliary feed (log 28 This vixiliary feed. dog is mounted on a feed T629 which in turn is mounted in the res or groove 2'? in the main feed bar. The feed bill is provided at its rear end spaced 3G and 31. fhese sigaced l secu l loy a pivot pin to the lower of if ccl operating lever 33, which. is located in the depending arm 13. The ur end of this lever cooperates with an ecccutric 3% on the rotliitahle shaft 16. The love 33 is attached to a pin which carried by the lower end of a second lever 36 This lei er 36 is forked at its upper end as at 37, and said forked end engages a, slide bloc-l: which in turn cooperates with an eccentric 39 on the shaft '16. The lever 36 is ilso provided with a longitudinal slot 40 in. m ch is mounted a fulcrum block ll cab riedhy a vertically adjustable fulcrum pin 4'2. Said pin extends through a slot l4 in the side wall of the arm 13 and the pin may he adjusted in. said slot and held in adjustpositions by loci: nut 45.

s the "fl'fiS the eccentric 8% will raise and lower the lever 33, the lev r 36 slidirc; on its fulcrum clocir and the Said throat plate is formed with block 38 which cooperates with the eccen trio 39,. The rotation of the shaft 16, through the lever 36 will give an. oscillation to the lower end of the lever It will thus be apparent that the pin 32 which connects the lever with the rear end of the man feed bar will have not only an up and down movement, but a sidewise movement and, this gives to the main feed bar the usual four motion that the feed dog is carried into engager'cnt with the material, is then lXlOVQCllJO feed the material, and then disengaged from the material and returned for its next feeding stroke. By adjusting the pin the throw oi? the lever 36 may be varied this will vary the sidewise movement of the pin 32 and the feeding increment of the slain fciigl dog.

'The niain feed bar is supported by a s "losing arm 48. Said arm is forked and I ired to the feed bar by pivot pin 17, extends through the forks and through the feed bar. The auxiliary feed bar 139 has a recess 48 in its lower face which gives space for this pivot pin'without intcrfer =g with the endwis'e movement of said auxiliary feed bar. T he arm l6 at its lower end is lulcrun'ied on. an eccentric sleeve 49, which s keyed to a pin 50 mounted on the work supporting arm and held in adjusted positions y a set-screw 51. Said pin is pr0- vided with s slot 52 to facilitate the turning of the pin. By loosening the set-screw 51 the pin and the eccentric carried thereby may be rotated so as to raise or lower the pivot pin of the arm l6 and this raises 0r lowers the main food bar and both feed dogs which are supported thereby. The arm 46 swings about its pivot point and serves to support the feed dogs, but said arm does not in any way regulate or control the movements of the feed dogs except to varythe reciprocating position of the same.

The auxiliary feed bar 9, as above noted, within the groove in the main feed oar .sud will be moved up and down therewith.

Said feed "oar, however, is moved endwise from a train of mechanism which is coniicch ed with the main feed bar. This traiil of mechanism consists of a rock arm 53 which is pivoted on a pin 5% journaled in. suitable lugs in the horizontal work supporting arm 14., The upper end of this arm is connected by a link 55 to the auxiliary feed oar. Said rock arm 58 is also connected by a link 56 to :1. lug 57 on the main feed liar Said. link is pivoted to a block at 58, which block is adapted to slide in a segmental. slot 59 in the rock arm 53. By shifting the block in said segmental slot the throw of the link 56, which is the same as that of the main feed bar. will impart a varying throw to the rock arm and. the movement of the rock arm will be directly imparted to ancillary feed bar through the link 55. s

a means for shifting this 56, I have provided a controlling lever 60 which is shown in perspective in Fig. 11; Said controlling lever is formed with a sleeve 61,

which is mounted on the supporting pin 54 for the rock arm 53, see Fig. 4, and with a forwardly projecting arm 62 which is pivoted to a link 63,.which in turn is pivoted to the link 56. The rearwardly projecting arm 64 oflthe controlling lever 60 extends along the side of the work supporting arm and carries a pin 65 which projects through [a segmental slot 66 in the side wall of the work supporting arm. Said pin at its outer end carries a handpiece 67. This hand piece has its inner face serrated and pressed by asprin'g 68 toward the work-supporting arm to engage a serrated lockingplate 69 fixed on said side wall. The operator, by taking hold of the hand piece, may pull the same outwardly .on the pin, compressing the spring, thus releasing the hand piece from the serrations in the plate 69, and may then movements imparted to the auxiliary feed dog will be substantially the same as the movements imparted to the main feed dog. When, however, this link 56 is shifted toward the fulcrum point of the rock arm, then the throw ofthe main feed dog will be multiplied and a longer throw will be imparted to the auxiliary feed dog. The'auxiliary feed bar is held in the groove or recess in the main feed bar by plates 29, which. are secured to the main feed bar and overlap the auxiliary feed bar. The auxiliary feed dog,"as clearly shown. in Fig. 1, is located in front of the needles and operates to feed the material in front of the needles a little faster than the main feed dog carries the material away from the needles and this permits a crowding in toward the foot of. an elastic material and prevents undue stretching of the same.

From the above description, it will be apparent that I have provided a differential feeding mechanism in which the mechanism which imparts a'difierential throw to the auxiliary feed dog is located whohlywithin the work supporting arm and said'mechanism is so proportioned and arranged that the work supporting arm may be relatively small. It will also be apparent that the work supporting arm is suspended bythe depending arm 13, so that there is a free space underneath this workisupporting arm and at each side thereof for guidingtlie mas.

terial which is to be stitched. Said material is fed oli from the end of the arm after it is stitched. This feeding mechanism receives all its-movements from a single connection with an operating lever which extends through the suspending meansfor the work supporting arm. This permits the suspending arm for the work supporting arm to be of relatively small dimensions.

' Cotiperating with the needles 5 and 6 beneath the work support are two loopers 69 and 70, respectively, and these loopers are carried by a looper shaft 71 which is mounted in suitable hearings in the work supporting arm. This shaft extends between the arms 30 and 31 of the, main feed bar into the lower end of the depending arm 13. Carried by the eccentric 34: is a crank pin 7 2. A link 73 is connected at the upper end to this crank pin and this link at itslower end is pivoted to an arm 74 carried by the looper shaft 71, see Fig. 12. The link adjacent its connection with the arm 7 4 is pivoted to a rod 75, which slides in a sleeve 76 and this sleeve is mounted in a suitable supporting bar 7 7, so that the sleeve may oscillate; Said rod 7 5 becomes a movable fulcrum for the link 73, so that as the crank pin 72 rotates, the lower end of the link 73 will have not only an up and down movement, but also a sidewise movement and this gives to the looper shaft an oscillating movement and an endwise movement which moves the loopers into the needle loops and thence laterally to avoid the needles, after which the loopers are retracted to shed the needle loops and are again brought to position for moving forward into the needle loops.

It is obvious that minor changes in the details of construction and arrangement of parts may be made without departing from the spirit of the invention asset forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination of a standard, an arm projectingoutwardly from the standard, 2..

depending arm carried by said projecting arm, a work supporting arm mounted at the lower end of said depending arm, a main feed bar in said work supporting arm, a feed dog carried by said feed bar, means connected to the rear end of said feed bar for moving the same endwise and for oscil:

lating the same, anauxiliary'bar located in said work supporting arm, a feed dog carried thereby and means disposed in said work supporting arm for reciprocating said auxiliary feed bar from said main feed bar.

"2. lhe combination of a work-supports ing arm, a main feed bar in said arm, a feed dog carried'by said main feed bar, means connected to the rear end of'said feed bar -for movingthe same endwise and for oscillating the same, an auxiliary feed bar located in said ivorlosupporting arm, a feed dog carried by said an iliary feed bar, and devices connected to the main feed bar adjacent the forward end thereof fo reciproeating said auxiliary feed bar.

3. The combination or a work-supporting arm, a main feed bar in said arnn a feed mg carried by said feed bar, means connected to the rear end of said teed bar for moving the same endwise and for oscillating the same, an auxiliary feed bar located in said work-supportinq arm, a feed dog carried thereby, means for reciprocating said auxiliary feed bar from said main feed bar, said means including devices dieposed within said work supporting arm whereby the throw of the auxiliary feed bar relative to the main feed bar may be varied at the will of the operator.

The combination of a cylindrical work supporting arm, a main feed bar extending from end to end thereof, a feed dog carried by said main feed bar, means-connected to the rear end of said feed bar for moving the same endwise' and for oscillating the same, an'auxiliary feed bar supported on said main feed bar and oscillating there with, and means for moving: said anxi iiary feed bar from the main food bar, whereby a differential movement may be given thereto.

The combination of a cylindrical worl: supporting arm, a main feed bar e1 ending from end to end thereof, a feed dog carried by said main .leed bar, means connected to the rear end of said feed bar for moving the same en-dwise and for oscillating the same, an auxiliary feed bar su portcd on said main feed bar and oscillating therewith, means for moving said auxiliary feed bar from the main feed bar, whereby a differential movement may be given thereto, and. hand controlled means for adius tin throw of the auxiliary ba 6 The combination of a r ain feed a feed dog carried thereby a sunpei arm pivoted to said feed bar ends, means connected to the re: feed bar for moving the said arm and for oscil. i about its pivotal connection .0 said 1111) I an auxiliary teed var nioui' on said i feed bar and oscillating therewith, for moving said auxiliarytecd bar A on the 11L. 1 :l'eed bar, Wherebv a ential movement may be given to said iliary feed ban 7. The combination of n'iain to. a feed (log carried there j, a supporting arm pivoted to said feed bar between its ends, means connected to the rear end of the feed bar for moving the same endvvise on aid arm and for oscillating said teed bar about its pivotal connection to said arm, an auxiliary feed lea-r mounted on said main.

i It) t cont-i. the operaror ror varying the throw 0 llllXlllil"3/ feed bar.

S. Th combination of a FIG supporting arm, a main food bar located in said Work supporting arm and e. cndii 1" 'rom and end thereof, a main feed dog c ied by main teed bar, an arm pivoted to the work supporting arm at its .oner end. and extend ing substantially vertically and having a pivoted connection at its upper end with tie main feed bar. means connected to the rear end of'the main feed bar for inovii'ig the same endwise on the pivotal support of the arm and for oscillating said main feed bar about its pivotal connection to the arm, an o= auxiliary feed ba located Within said Work supportin arm, a rock arnn 121621118 for cs cillat-ing said roci: arm from the main feed bar, and adjustable means for connecting the auxiliary teed bar of d rock arm for so reciprocating said auz-riliary feed lninz 9. The combination of \vo, sup

arnn a main feed it i d in sait.

supporting arm a' end thereof, a. 21' 5:5

main feed bar rear end of the the bar an aux l bar a located \v .n.

nesting the arm for re be said on the pivotai support of the arm and .or oscillating said main iced bar about pivotal connection to the rum an ailiary teed bar located Withii'i sal pporting arm, a rock arm, nu for oscillating said rock arm main feed o r, adv ole means auxiliary feed bar,

for connecting the auxiliary feed bar of said rock arm for reciprocating said auxiliary feed bar, said auxiliary feed bar being mounted in. the main feed bar and oscillating therewith, and means controlled by the operator for shifting the connection between the rock arm and the main feed bar for varying the throw of the auxiliary feed bar.

11. The combination of a work supporting arm, a main feed bar extending lengthwise of said arm and having a groove in its upper face, a feed dog carried by said main fee bar, an auxiliary feed bar located in the groove of the main feed bar, means for retaining the auxiliary feed bar in said groove, means for moving said main feed bar endwise, means for simultaneously raising and lowering said main ,feed bar and auxiliary feed bar to cause the feed dogs to engage and disengage the material, and positively connected devices actuated by the main feed bar for imparting a positive differential feeding. movement to the auxiliary feed bar.

12. The combination of a work supporting arm, a main feed bar located in said work supporting arm and extending lengthwise thereof, a feed dog carried thereby, an auxiliary feed bar'supported by said main bar, a feed dog carried by the auxiliary feed bar, means for moving said main feed bar endwise and for raising and lowering the end thereof carrying the feed dogs, a rock arm {pivoted to the work supporting arm, a linkconnecting saidrock arm to the and a second link having an adjustable connection with the rock arm and pivoted to said main feed bar.

13. The combination of a work supporting arm, a main feed bar located in said work supporting arm and extending lengthwise thereof, a feed 'dog carried thereby, an auxiliary feedbar supported by said main feed bar, a feed dog carried by the auxiliary feed bar, means for moving said main feed bar enrlwi se and for raising and lowering the end thereof carrying the feed dogs, a rock arm pivoted to the work supporting arm, a link connecting said rock arm to the auxiliary feed bar, a second link having an ad justable connection with the rock arm and pivoted to said main teed bar, a controlling lever connected to said adjustable, link, a hand piece connected to the controlling lever for shifting the ing the said hand piece in an tion. I

14:. The combination of a standard, an overhanging arm carried by the standard, a needle bar reciprocating in said overhanging arm, needles carried by said needle bar, an ,arm projecting outwardly and upwardly from said standard, a depending arm carried by said projecting arm, a work supporting arm mounted at the lower end of said dedjusted posifeed same, and me us for lock-- ending arm and having its free end extending underneath the free end of the overhanging arm, a main feed dog in said work supporting arm, a feed bar carrying the same and extending from end to end of said arm, devices located in said depending arm and connected to the rear end of said feed bar for oscillating and for moving said feed bar endwise, a pivoted arm in the work supporting arm for supportin said main feed bar, an auxiliary feed ar in said work supporting arm, and means operated from 'said main feed bar for imparting a gifferential movement to said auxiliary feed 15. The combination of a standard, an overhanging arm carried by the standard, a needle bar reciprocatin ing arm, needles carrie in said overhangby said needle bar an arm projecting outwardly and upwardly 35 barendwise, a pivoted arm in the work supporting arm for supporting said main feed bar, an auxiliary feed bar supported by said main feed bar, a feed dog carried by said auxiliary feed bar, and means for moving said auxiliary feed bar on said main feed bar and giving a difierential feeding movement thereto.

16. The combination of a standard, an overhanging arm carried by the standard, a needle bar reciprocating in said overhanging arm, an arm projecting outwardly from said standard, a dependino arm carried by said projecting arm, a wor -supporting arm mounted at the lower end of said depending arm and having its free end extending underne th the free end of the overhanging arm, lat-feeding mechanism located in said work-supporting arm and including a main feed dog and an auxiliary feed dogfmeans for giving said main feed dog feeding movements, means disposed in said work suparm and having its free end extending underneath the free end of the overhanging arm, a feeding mechanism located in said Work-supporting arm and including a main feed dog and an auxiliary feed dog, means for giving said main fee l dog feeding movements, means disposed Within said Work supporting arm for giving said auxiliary feed dog feet movements, devices for controlling the ovements of the auxiliary teed dog, said devices including a lever, a hand piece connected to the outer end of said lever, and means cooperatin with the hand piece for holding the lever in adjusted positions.

18. The combination of-a standard, a horizontal arm supported by the standard, a ver tical arm at the free end of said horizontal arm and depending therefrom, a work-supporting arm carried at the lower end of said depending arm and extending in a direction Substantially at right angles to the horizontal arm, a feeding mechanism including a main feed bar located in said Worlesupport ing arm, a feed dog carried thereby, a rotating shaft mounted in said horizontal arm, devices operated by said rotating shaft for moving said-main feed bar back and fort and for raising and lowering the feed dog, an auxiliary feed bar mounted in said Worlc supporting arm, a feed dog carried by said auxiliary feed bar, and means connected to said main feed bar and located in said Worksupporting arm for operating said feed bar.

19. The combination of a standard, ahorizontal arm supported by the standard, a vertical. arm at the free end of said horizontal arm and depending therefrom, a ivork-supporting arm carried at the lower end of said depending arm and extending in a direction substantially at right angles to the horizontal arm, a feeding mechanismincluding a. main feed bar located in said work-supauxiliary :uerases a porting arm, a feed dog carried thereby, a rotating shaft mounted in said horizontal arm, devices operated by said rotating shaft for moving said main iced bar back and forth and. for raising and lowering the feed dog, an auxiliary feed has mounted in said Work-supporting arm, a d dog carried by said auxiliary feed bar, l d means ci'mnected to said main feed bar a d located in said Work-supporting arm for operating" said auxiliary feed bar, said last named means including devices whereby the stroke the auxiliary feed bar may be varied.

20. The combination of a standard horizontal arm supported by the standard, a vert-ical arm at the free end of said horizontal arm and depending therefrom, a Wo1rh-supporting arm carried at the lower end of depending arm and extending in a direction substantially at right angles to the horizontal arm, a feeding mechanism including main feed bar located in said WOIk-SHPPOIE,

ing arm, a feed dog carried thereby, a rotating shaft mounted in said horizontal arm, devices operated by said rotating shaft for moving said main feed bar back and forth and for raising and lowering the feed dog, an auxiliary feed bar mounted in said worksupporting 211111,;1 feed dog carried by said auxiliary teed bar, means connected to said Ina-in feed. bar and located said vvorlcsupporting arm for operating said. auxiliary feed bar, a lever for varying the stroke of the auxiliary feed dog, and a hand iece attached to said lever and located un'erneath the horizontal arm on the side Wall of the dependinp arm.

In testimony whereof, I atlix my signature, in the presence of two Witnesses.

JOSEPH BERGER, J's. Witnesses L. D. McCoRMAo, EARL O. CLARK. 

